Not only am I a working mom, but I am a fourth grade teacher too, so I see this issue from both sides. I stay involved in my son's preschool by signing up for parties and bringing treats. Field trips are a good way to get involved too. There is generally more than a week's notice for any school trip so that a working mom can arrange her schedule to help out the teacher. There are also opportunities to volunteer outside of working hours. Call your child's teacher and ask if there are any calls she needs made to other parents or any parties she needs help planning. Primary grade teachers often need help with cutting patterns or tracing things, which can easily be done at night if the teacher sends it home with your child. The PTO/PTA in your school will have lots of committees to volunteer for that meet in the evenings. Just be proactive and make the call to your child's teacher. As a teacher, I love to hear from parents who want to help. The feeling of support and community is great!